package com.it.consumer.controller;

import com.it.consumer.domain.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("/goods/{id}")
    public Goods findGoodsById(@PathVariable("id") int id) {
        System.out.println("findGoodsById..." + id);
        //远程调用Goods服务中的findOne接口
        /*
            动态从Eureka Server 中获取 provider 的 ip 和端口
             1. 注入 DiscoveryClient 对象.激活
             2. 调用方法
         */
        List<ServiceInstance> instances = discoveryClient.getInstances("EUREKA-PROVIDER");
        if (instances == null || instances.size() == 0) {
            return null;
        }
        ServiceInstance instance = instances.get(0);
        String host = instance.getHost();
        int port = instance.getPort();

        System.out.println(host);
        System.out.println(port);
        String url = "http://"+host+":"+port+"/goods/findOne/" + id;
        Goods goods = restTemplate.getForObject(url, Goods.class);

        return goods;
    }
}
